17 references, page 1 of 2 [1] H. Amann, E. Zehnder, Nontrivial solutions for a class of nonresonance problems and applications to nonlinear differential equations, Ann. Scuola Norm. Sup. Pisa 7 (1980), 539-603.

[2] A. Ambrosetti, P.H. Rabinowitz, Dual variational methods in critical point theory and applications, J. Funct. Anal. 14 (1973), 349-381.

[3] P. Bartolo, V. Benci, D. Fortunato, Abstract critical point theorems and applications to some nonlinear problems with “strong” resonance at infinity, Nonlinear Anal. 7 (1983), 981-1012.

[4] V. Benci, On the critical point theory for indefinite functionals in the presence of symmetries, Trans. Am. Math. Soc. 274 (1982), 533-572.

[5] V. Benci, A. Capozzi, D. Fortunato, Periodic solutions of Hamiltonian systems with superquadratic potential, Ann. Mat. Pura Appl. CXLIII (1986), 1-46.

[6] J. Cossio, S. Herr´on, C. V´elez, Existence of solutions for an asymptotically linear Dirichlet problem via Lazer-Solimini results, Nonlinear Anal. 71 (2009), 66-71.

[7] M. Degiovanni, S. Lancelotti, Perturbations of even nonsmooth functionals, Differential Integral Equations 8 (1995), 981-992.

[8] M. Degiovanni, S. Lancelotti, Perturbations of critical values in nonsmooth critical point theory, in “Well-posed Problems and Stability in Optimization” (Y. Sonntag Ed.), Serdica Math. J. 22 (1996), 427-450.

[9] M. Degiovanni, V. Raˇdulescu, Perturbations of nonsmooth symmetric nonlinear eigenvalue problems, C.R. Acad. Sci. Paris S´er. I 329 (1999), 281-286.

[10] M.A. Krasnosel'skii, Topological Methods in the Theory of Nonlinear Integral Equations, Translated from the Russian edition, Moscow, 1956 (A.H. Armstrong, J. Burlak Eds), Pergamon, London; Macmillan, New York, 1964.